reference. Pulliam, T.H.; Steger, J.L.: Recent Improvements in Efficiency, Accuracy, and Convergence for Implicit Approximate Factorization Algorithms. AIAA Paper 85-0360, 1985.[cfd-r2-9]
Pulliam与Steger关于隐式近似分解算法改进的AIAA会议论文，此处用于网格相对固定坐标系运动的处理。